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Limit minimum zoom level

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This commit is contained in:
Mark Watkins 2011-08-29 10:10:46 +10:00
parent 0a4cd5380c
commit 2a4b2d6544
1 changed files with 3 additions and 1 deletions
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4
Graphs/gGraphView.cpp
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@ -141,6 +141,7 @@ EventDataType LayerGroup::Maxy()
} }
const double zoom_hard_limit=500.0;
gGraph::gGraph(gGraphView *graphview,QString title,int height,short group) : gGraph::gGraph(gGraphView *graphview,QString title,int height,short group) :
m_graphview(graphview), m_graphview(graphview),
@ -489,6 +490,7 @@ void gGraph::mouseReleaseEvent(QMouseEvent * event)
if (event->modifiers() & Qt::ControlModifier) zoom/=1.5; if (event->modifiers() & Qt::ControlModifier) zoom/=1.5;
} }
xx*=zoom; xx*=zoom;
if (xx<qq/zoom_hard_limit) xx=qq/zoom_hard_limit;
if (xx>qq) xx=qq; if (xx>qq) xx=qq;
} }
double j1=xmult*x; double j1=xmult*x;
@ -576,7 +578,7 @@ void gGraph::ZoomX(double mult,int origin_px)
double q=span*mult; double q=span*mult;
if (q>hardspan) q=hardspan; if (q>hardspan) q=hardspan;
if (q<hardspan/400.0) q=hardspan/400.0; if (q<hardspan/zoom_hard_limit) q=hardspan/zoom_hard_limit;
min=min+origin-(q*ww); min=min+origin-(q*ww);
max=min+q; max=min+q;